/***************************************************************
 * @file           hfdp_utils.c
 * @brief
 * @author         WKJay
 * @Version
 * @Date           2024-02-04
 ***************************************************************/
#include "hfdp_utils.h"

static unsigned const char table_crc[256] = {
    0x00, 0x1D, 0x3A, 0x27, 0x74, 0x69, 0x4E, 0x53, 0xE8, 0xF5, 0xD2, 0xCF, 0x9C, 0x81, 0xA6, 0xBB, 0xCD, 0xD0, 0xF7, 0xEA, 0xB9, 0xA4, 0x83, 0x9E,
    0x25, 0x38, 0x1F, 0x02, 0x51, 0x4C, 0x6B, 0x76, 0x87, 0x9A, 0xBD, 0xA0, 0xF3, 0xEE, 0xC9, 0xD4, 0x6F, 0x72, 0x55, 0x48, 0x1B, 0x06, 0x21, 0x3C,
    0x4A, 0x57, 0x70, 0x6D, 0x3E, 0x23, 0x04, 0x19, 0xA2, 0xBF, 0x98, 0x85, 0xD6, 0xCB, 0xEC, 0xF1, 0x13, 0x0E, 0x29, 0x34, 0x67, 0x7A, 0x5D, 0x40,
    0xFB, 0xE6, 0xC1, 0xDC, 0x8F, 0x92, 0xB5, 0xA8, 0xDE, 0xC3, 0xE4, 0xF9, 0xAA, 0xB7, 0x90, 0x8D, 0x36, 0x2B, 0x0C, 0x11, 0x42, 0x5F, 0x78, 0x65,
    0x94, 0x89, 0xAE, 0xB3, 0xE0, 0xFD, 0xDA, 0xC7, 0x7C, 0x61, 0x46, 0x5B, 0x08, 0x15, 0x32, 0x2F, 0x59, 0x44, 0x63, 0x7E, 0x2D, 0x30, 0x17, 0x0A,
    0xB1, 0xAC, 0x8B, 0x96, 0xC5, 0xD8, 0xFF, 0xE2, 0x26, 0x3B, 0x1C, 0x01, 0x52, 0x4F, 0x68, 0x75, 0xCE, 0xD3, 0xF4, 0xE9, 0xBA, 0xA7, 0x80, 0x9D,
    0xEB, 0xF6, 0xD1, 0xCC, 0x9F, 0x82, 0xA5, 0xB8, 0x03, 0x1E, 0x39, 0x24, 0x77, 0x6A, 0x4D, 0x50, 0xA1, 0xBC, 0x9B, 0x86, 0xD5, 0xC8, 0xEF, 0xF2,
    0x49, 0x54, 0x73, 0x6E, 0x3D, 0x20, 0x07, 0x1A, 0x6C, 0x71, 0x56, 0x4B, 0x18, 0x05, 0x22, 0x3F, 0x84, 0x99, 0xBE, 0xA3, 0xF0, 0xED, 0xCA, 0xD7,
    0x35, 0x28, 0x0F, 0x12, 0x41, 0x5C, 0x7B, 0x66, 0xDD, 0xC0, 0xE7, 0xFA, 0xA9, 0xB4, 0x93, 0x8E, 0xF8, 0xE5, 0xC2, 0xDF, 0x8C, 0x91, 0xB6, 0xAB,
    0x10, 0x0D, 0x2A, 0x37, 0x64, 0x79, 0x5E, 0x43, 0xB2, 0xAF, 0x88, 0x95, 0xC6, 0xDB, 0xFC, 0xE1, 0x5A, 0x47, 0x60, 0x7D, 0x2E, 0x33, 0x14, 0x09,
    0x7F, 0x62, 0x45, 0x58, 0x0B, 0x16, 0x31, 0x2C, 0x97, 0x8A, 0xAD, 0xB0, 0xE3, 0xFe, 0xD9, 0xC4};

unsigned char hfdp_crc8(unsigned char *message, unsigned char byte_len) {
    unsigned char crc;
    unsigned char byte_idx;

    crc = 0xFF;

    for (byte_idx = 0; byte_idx < byte_len; byte_idx++) {
        crc = table_crc[crc ^ *(message + byte_idx)];
    }
    return (~crc);
}

int hfdp_ring_init(hfdp_ring_t *ring) {
    if (ring == NULL) {
        HFDP_LOG("ring is NULL\r\n");
        return -1;
    }

    ring->len = 0;
    ring->head = 0;
    ring->tail = 0;

    return 0;
}

uint8_t hfdp_ring_is_empty(hfdp_ring_t *ring) {
    if (ring == NULL) {
        HFDP_LOG("ring is NULL\r\n");
        return 0;
    }

    return ring->len == 0;
}

uint8_t hfdp_ring_is_full(hfdp_ring_t *ring, RING_PTR_TYPE len) {
    if (ring == NULL) {
        HFDP_LOG("ring is NULL\r\n");
        return 0;
    }

    return (ring->len + len) > HFDP_NRT_BUFFER_LEN;
}

int hfdp_ring_enqueue(hfdp_ring_t *ring, uint8_t *data, RING_PTR_TYPE len) {
    RING_PTR_TYPE i;
    if (len == 0) return 0;

    if (ring == NULL || data == NULL) {
        HFDP_LOG("ring or data is NULL\r\n");
        return -1;
    }

    if (hfdp_ring_is_full(ring, len)) {
        HFDP_LOG("ring is full\r\n");
        return -1;
    }

    for (i = 0; i < len; i++) {
        ring->buffer[ring->tail] = data[i];
        ring->tail = (ring->tail + 1) % HFDP_NRT_BUFFER_LEN;
    }
    ring->len += len;

    return 0;
}

int hfdp_ring_dequeue(hfdp_ring_t *ring, uint8_t *data, RING_PTR_TYPE len) {
    RING_PTR_TYPE i;
    RING_PTR_TYPE real_len;
    if (len == 0) return 0;

    if (ring == NULL || data == NULL) {
        HFDP_LOG("ring or data is NULL\r\n");
        return -1;
    }

    real_len = ring->len < len ? ring->len : len;

    for (i = 0; i < real_len; i++) {
        data[i] = ring->buffer[ring->head];
        ring->head = (ring->head + 1) % HFDP_NRT_BUFFER_LEN;
    }
    ring->len -= real_len;

    return real_len;
}
